EXC_Breakpoint 滚动视图崩溃 [英] Crash on EXC_Breakpoint Scroll View

问题描述

自从我为 iOS 7 更新我的应用程序以来，这是一个新问题.每次我在我的设备或模拟器上启动应用程序时，我都会收到此错误代码

This is a new problem I have been having ever since I've been updating my app for iOS 7. Everytime I launch the app on my device or simulator, I get this error code

RecipeDetailViewController scrollViewDidScroll:]: 消息发送到释放实例 0x15746c40 并且它崩溃了.

RecipeDetailViewController scrollViewDidScroll:]: message sent to deallocated instance 0x15746c40 and it crashed.

我启用了 NSZombie，这就是它给我的代码.在它给出 exc_bad_access 代码之前.

I enabled NSZombie and that was the code it gave me. Before it was giving a exc_bad_access code.

这是我的 ScrollViewDidSCroll 代码

This is my code for ScrollViewDidSCroll

- (void)scrollViewDidScroll:(UIScrollView *)scrollView{


    // Depending on how far the user scrolled, set the new offset.
    // Divide by a hundred so we have a sane value. You could adjust this
    // for different effects.
    // The larger you number divide by, the slower the shadow will change

    float shadowOffset = (scrollView.contentOffset.y/1);

    // Make sure that the offset doesn't exceed 3 or drop below 0.5
    shadowOffset = MIN(MAX(shadowOffset, 0), 0.6);

    //Ensure that the shadow radius is between 1 and 3
    float shadowRadius = MIN(MAX(shadowOffset, 0), 0.6);



    //apply the offset and radius
    self.navigationController.navigationBar.layer.shadowOffset = CGSizeMake(0, shadowOffset);
    self.navigationController.navigationBar.layer.shadowRadius = shadowRadius;
    self.navigationController.navigationBar.layer.shadowColor = [UIColor blackColor].CGColor;
    self.navigationController.navigationBar.layer.shadowOpacity = 0.2;
}

推荐答案

另一个(不优雅的，imo)解决方案是在 dealloc 时将表的委托设置为 nil:

Another (inelegant, imo) solution is to set your table's delegate to nil on dealloc:

- (void)dealloc {
    [_tableView setDelegate:nil];
}

似乎是一个错误，但我不能保证.我仍在为此寻找合理的解释.

Seems to be a bug, but I can't guarantee. I am still looking for a reasonable explanation for that.

注意:这可能适用于任何 UIScrollView 子类，而不仅仅是 UITableView.

Note: that probably applies for any UIScrollView subclass, not only UITableView.

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